Feeding mechanism for sewing-machines.



a', G. WUUDWARD. FEEDING MECHANISM FOR SEWSNG MACHINS.

APPLICATION HLED MINE 17. 1910.

Patente 51m. 9,1917'.

3 SHEETS-SHEET l.

R. G. WOODWAR. FEEDING. MECHANISM ma SEWING MACHINES.

APPLICATION FILED IUNE I7. 1910. 'MM l R. G. WOODWARD. EEEDI'NG MECHANISM FOR SEWING MACHINES.

APPLICATION FILED JUNE IT. 1910. 1921 93040 Patented Jang, 1917.

n 3 SHEETS-SHEET 3.

(L3-wu amilo/a "to ehe other for irrijearting RUSSEL G. VGDW'AR, 0F YJ'KEGAN, ILLNCS, ASSIGNOB, TO NIGN SPECIAL A .'MACHNE COMPANY, QF CHCAGG, .'ZLLINGS, A CPJPOBATION OF ILLINOIS.

reime/i.

To all/017mm t 'may concern.

Be ilb known that Bossen G. lllomnman. a ciizen of 'ehe United States, residing alf. Wfa'uireg'an, in the munity of Lake, State of Illinois, have invented certain new and oseful inproveinenivs in Feeding lf'ieclianisms for SeWing-li/lachines, of which the folios ing is a description, reference being liao to the accompanying drawing and to the letjters and igures of reference lreci thereon...

The invention relai-es improvements in feecl' f. .sins for sewing machines, and rn 'e especially 'eo a .feeding mechanism emboying l*iro feed dogs Whicii are .given a diierentiai more nient reiative 'so each other.

en olijee; ei? fine .neeliaaisni 1for y m wherein s be will 'be posirivelj. moved, trae? and ior'li and up and down. with iinle weer possible7 and wiiali l e. two feeol floffs 'minimum ammini; of ribration in the parts being operaeo.

A fnrlier objeoe of inif'en''fn is te provide a feeding mechanism oi 'the above oliarae'er with, two feerl bars which are joined. 'ogelier so that sai e in -miison to oa i'sii if' e nient with Elie i .'e and. s feed `bars .may more lonfit' feeding' movement to gne oi 'elle These anfl other olijee f in p `viens?l ancilwill in part be liereina fully' (iesorlilie. l

in the clrrnrings which show by Way of illusration one emiioriiment of lie invenion: Figure l is from View of a portion of a machine harina.' my feeding mechanism applied thereto, 52 is an enfl View of iilie saine. l Fig. 3 is plan View oi illie feecl ing meelianism. Fig. i is a perspective View of the essentiel. 'paris of rire feeding mechanism. Fig. 5 is detail showing; the sliding' connection be'ween he -wo feec'i liars. 6 is a. detail in sicie ele""`*.ion oi 'elle main feed bar .and the supper ,or the feed clog.

Myiinprovecl feeding' meeiiax'iisln comprises two feedA fiogs w'iicli are preferably arranged one (lirecllj7 aflrarfee of the einer., which feeti Clogs are also preferably operati-ifi .in manner canse a s" f faster feeding mover/nene lo? (ie-g' jiean by ri. whereby the fabric 'oeiiig si. i

Specification of Letters atent.

crowded underneath bhe presser foot to ille stitching mechanism, so gliat all liability of strerchingg' elle fabric and opera-ting upon loose .lrni goods, is avoiclefl.

My invenion is espeeiallj)7 adapt-ed for an overseareing machine wherein knit goods may be Jeriinined and lie edge of the fabric or fabrics being joined covered Wili overseaniing stitehes.

in the rirawings l have shown a portion of an orrlinary sewing machine which consist-s oi? a lier. alare i on which is mounted an eroi-hanging arm carrying a neeclie Vibrating lever Winch reeiprocabes in the ordinary Way, a needle 2. rihe Work being operared upon is supporeri by 'the Usual cloth plate lieid in cooperative relation with the feeding mechanism ajf bhe presser foot, which may be of any desired construction.

| in'iprove(i 'eeriing mechanism eonsisjs o a feed clog' e ami. an auxiiiary feed (ieg clearly shown in she dra-Wings,

the auxiliary feed oaf is mountecl so as to' abrio direey in front ehe "1' ire 1n ain ieecl flog is conieeel ber 5, ai; the forward slots and screws 9 extendingtlirongjh the slols and engaging' the ioioek? ro liol liearm in its various adjusted positions on Lilie block 7. E will readily loe seen by loosening the screws Sl, anar the main feeci dog may lie adjusted ransversely of 'lie main fee iar.

The bioel supporting: elle main feerl oiog is carried bye. shank 10 'which is acijnstabl'y connected to folie main feeri 'bar by means of a screw 11 which passes through a vertical slols in said shank and .is threaded into the main feed bar. This slotted connection iler the slianlr the supporting block carrying elle main feed dog. alows for a. slight vertiea adjustment of the feed dog relative to the feed bar on which ii, is mounted.

The .'roriliar.T feed ologf is carried by an auxiliary feeclL bar if-3. Saicl auxiliary feed liar at the forwarf enc carries an. upwardly and icorwarclly projecing i3 on which ref ieer og is mounted. Said erm i3 is my onderneah so as to allow clearance for the operation of the looper.. Inasmuch.

as the feed dog carried by said auxiliary feed bar is in advance of the main feed dog and the stitching point," this clearance for the looper in the auxiliary feed bar is essential. The forward end of the arm 13 is provided with a rib 14, which engages a recess formed in the rear face of the shank supporting the auxiliary feed dog 4. Said shank is also slotted vertically and a screw 15 passing through the slot into the end of the arm 13 rwill secure the auxiliary feed dog onthe end of the supporting arm therefor. By loosening the screw 15, said auxiliary .feed dog may be adjusted vertically relative to the auxiliary feed bar.

As a means for operating the feed bars to give the feed dogs their various feeding movements, I have provided the usual feed rocker 16, which is pivoted at 17 to ears carried by the bed plate 1. vSaid feed rocker 16 has rigidly secured thereto an arm 17, which extends forwardly to a point substantially over the main shaft 18. An eccentric 19 carried by the main shaft 18 coperates with a strap.20 which at its upper end is pivoted to the N4arm 17 carried by the rocker frame. As the main shaft rotates, the eccentric through its connection with the arm 17 will oscillate the feed rocker back and forth. The mainfeed bar 5 at its rear end is pivotally connected to the feed rocker so that the oscillating movements of the feed rocker are directly imparted to the main feed har moving the same back and forth to feed the fabric in the well known way.

The auxiliary feed bar 12 is slidingly .con-

` nected to the main feed bar. Said main feed bar has rigidly attached thereto on its under face, a hardened plate 21 which extends laterally froml the main feed bar and on this hardened plat'ethe auxiliary feed bar rests and slides. The auxiliary feed bar at its 1rear end carries a downwardly' projecting arm 22, which has a laterally projecting lug 23 that is adapted to engage the under surface of the main feed bar or a wear plate moving therewith. This lug carried by the arm projecting from the auxiliary feed bar will pr.\vent the rear end of the feed bar from being raised but tilted longitudinally as the auxiliary feed dog is pressed up against the fabric into feeding engagement therewith. To further guide the auxiliary bar, I have provided aplate 24 which is rigidly secured to the upper face of the main feed bar by screws 25. Said plate 24 projects laterally from the main feed bar, over the auxiliary feed bar, and at its outer end carries a downwardly projecting lip 26 which extends down across the face of the auxiliary feed bar.

From the above' description it will be noted that I have formed a box or bearing by the hardened plate 21 and the plate 24:

with `the depending lip Q6 together with the side face of the main feed bar and in this box or bearing the auxiliary feed bar slides back' and forth when adierential movementis given to said auxiliary feed dog.

The rear end of the auxiliary feed bar carries upwardly spaced cars 27. A link 2S is pivoted between the ears 27 at one end and at the other end is pivotally connected with a stud 29 adjustably mounted in a slot 2:30 formed in an upwardly projecting arm il carried .by the feed rocker 1G. A. nut 32 on the outer end of the stud 29 will hold said stud in its adjusted positions.

The pivotal connection between the main feed bar and the feed rocker is at a point above the fulcrum of the feed rocker and as the feed rocker is oscillated, a certain predetermined movement will be imparted to the main feed dog, the extent of which movement depends upon the throw of the feed rocker. The auxiliary feed bar through the link 28 is also pivotally connected to the feed rocker, but as shown in the drawings, at a point farther distant from the fulcrum of the feed rocker than the pivotal connection for the main feed bar. During the oscillating movements of thek feed rocker,

therefore,the pivotal connection between said feed rocker and the link will more a greater distance than the pivotal connection between the feed rocker and the main feed bar. This greater movement imparted to the pivotal connection between the link and the feed rocker likewise imparts a greater movement to the auxiliary feed bar so that the auxiliary feed dog will be given a differential movement relative to the main 'feed dog and this differential movementmay be adjusted by varying the position of the stud 29 in the slot in the feed rocker. The feed dogs are moved up and down in unison by an eccentric 33 which is carried by the main shaft 18. Said eccentric bears against. vthe 4hardened plate 21 and raises the two feed bars which rest on said plate in unison. A bracket 34C is secured to the main feed bar by the screws 35 and extends underneath the eccentric 33, so as to positively lower the feed dogs from engagement with the material. Said bracket also extends at its rear along the main feed bar, and forms a wearing plate for the projecting lug carried oy the arm at the rear end of the auxiliary feed bar.

It will be seen from the above description that I have provided a feeding mechanism. in which the two feed dogs are arranged one in advance of the other and wherein the mechanism for operating the feed dogs movesvsaid feed dogs positively buck and forth and up and down. It will be further noted that the above mechanism imparts an up and down movement to the feed dogs 4in unison and that the forward feed dog may 'feeding'meclianisni whereby the be moved faster than the feed dog, giving proper feeding movements to the same .is especially adapted for operating Upon loose knit goods so that the saine inay be fed to the stitching mechanism Without in any Way stretching,` or distorting said lnit goods. It will be obvious of course, that my mechanisni one feed dog may be inoyed faster than the other for the purpose of rattling or gathering the material.

Having thus particularly described my invention, what l claim as new and .desire to secure by Letters Patent is l. ln a sewing machine, a feeding naechanism including in combination a inain feed bar, a main feed dog carried thereby, a rocking frame fulcruined on the bed of the machine, means for pivotally connecting said main feed bar to said reciting,- frame at a point above said fulcruin, a second feed bar, a feed dog carried thereby v id locate-l in advance of said first nan ef' dog, means for raising and lon/'crine said feed bars in unison, and means for moving said second feed bar' backend forth, including a link pivotally connected at one end to the rear end of said second named feed bar, and at its other end to a stud, stud being1 adjustably'secured in a substantially vertical slot formed in an upw rdly projecting arm carried by said feed rocker.

2. A feeding mechanism for sewing inachines including in combination, a main feed bar, a -feed dogcarried thereby, an auxiliary feed bar, a feed dog carried thereby, a later- 'aily projecting hardened plate carried by the under face of one of said feed bars on which the other feed bar is adapted to rest and slide, means for holding said sliding feed bar on said plate, means for moving said feed bars back forth. and for moving oneiffeed bar relative to another, and means engaging said hardened plate for moving said feed bars up and vdown in unison.

, A feeding; mechanism including in combination, a inain feed har, a feed dos,i carried thereby, an auxiliary feed feeddog carried thereby and located in advance of the main a laterally projecting l dog', hardened plate carried the under face of one of said ,d bars on which the other feed bar rests and slides, a second projecting plate carried one saif feed bars and extending or r the other feed bar for holdingl it in engagement with said rst named projecting i'ilate, one of said plates having a projecting; lip for 'nearing in which the sl means for nio'v'w forth, ggjiyi" ment relative to the i gagging said liarilened moving" said feed liars i unison..

forming an inclosed dine feed har nieves, ed bars baci and a sliding; nievea n d down in "rearwardly projecting arin carrying a lun' ating plate for` el. A feedingl mechanism for sewing niachines including in combination a main feed bar, a feed dog carried thereby, an auxiliary feed bar, a feed dog,`- carried thereby, a laterally projecting plate secured to one feed bar on which the other feed bar is adapted to rest and slide, means for holding sai'd last .named feed bar in sliclinp engagement with said plate, one of said feed bars having a vextending underneath the other feed bar and slidingly engaging the 'same for pil-"- venting the feed bars from tilting longitudinally relative to each other, ineans for moving said feed bars' back and forth andfor sliding onefeed bar relative to the other, and means for raising and lowering said feed bars in unison,

5. A feeding mechanism for sewing niachi-nes, including in combination a feed rocker, means for oscillating said fee'd rocker, a main feed bar pivoted to said feed rocker, a laterally projecting plate carried by said inain feed bar, an auxiliary feed bar resting and sliding on said projecting plate, a second plate for holding Said auxiliary feed bar on said plate, a link pivoted at one end to the rear end of said auxiliary feed bar and adjustably connected at its other end to said feed rocher, means for raising and lowering said feed. bars in unison, a main feed dog carried said main feed bar and an. auxiliary feed dog carried by said auxiliary feed bar and located in advance of said main feed dog.

6. Acfeeding mechanism including-in combination, a feed rocker, means for operating the saine, a main feed bar pivotally con-v nected -to said feed rocker, a hardened plate secured to the under side/of the inain feed bar and projecting laterally therefrom, a bracket carried by the under side of said feed bar, a cam located between saidhracket and said hardened plate for raising and lowering said feed bar, a feed dog` carried by said main feed bar,'an auxiliary feed bar resting and sliding on said laterally projecting plate, a second plate carried by said main feed bar and engaging the upper face of the auxiliary feed bar for holding the same on said first named plate, one of said plates having a laterally projecting lip for preventing the auxiliary feed bar from lateral. movement, an auxiliary feed dog carried by said 'auxiliary feed bar and engagingthe fabric in advance of the main feed dog, said auxiliary7 feed bar having a rearwardly projecting` arm carrying a laterally projecting lug` slidingly engaging the under face of the main feed. bar, a link` pivoted to said auxiliary feed bar at one end and having an adjustable pivotal connection with the 'feed rocker at its other end.

7, [L feeding mechanism including in cornbination, a niain feed bar, a feed dog, carried thereby, an auxiliary feed bar, means rearwardly extending shank, said auxiliary feed dog having a rearwardly projecting arm carrying a lug which slidingly engages the shank of said bracket for reventing the auxiliary feed bar from tilting longitudi`- nally relative to said main feed bar.

8. A feeding mechanism for sewing machines including in combination, a main feed bar, a feed dog carried thereby, an auxiliary feed bar extending to a point in ad- Vance of the needle, a feed dog, carried by said auxiliaryfeed bar, means for adjustably supporting said feed dog on the for- Ward end ef said auxiliary feed bar,-ineana` for meving said lauxiliary feed h'ar hack and forth and up and down, said auxiliary feed bar having its under face adjacent the forward end thereof cut away so as to form a clearance for the stitch-forming elements cceeff-rating with the needle below the Work support. v

9. A feeding mechanism for sewing machines vincluding in' combination, a main feed bar, a feed dog carried thereby, means for operating the main feed bar, an auxilf iary feed dog, a support for tlie same located entirely at one side of the main feed bar, but

with said auxiliary feed dog in line with the 

